LG | JRNU30GTPA4.APUNE | LG JRNU30GTPA4.APUNE Owner’s Manual

ENGLISH
OWNER’S MANUAL
AIR
CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
CEILING CASSETTE - 4WAY
www.lg.com
P/NO : MFL65920702
Ceiling Cassette - 4Way Type Indoor Unit Owner s Manual
TABLE OF CONTENTS
FOR YOUR RECORDS
Safety Precautions.................3
Write the model and serial numbers here:
Model #
Serial #
Prior to Operation ..................6
You can nd them on a label on the side of each unit.
Dealer's Name
Date Purchased
Operating Instructions...........7
Maintenance and Service ......8
Before you Call for Service
............................................10
 Staple
your receipt to this page in the event you need
it to prove date of purchase or for warranty issues.
READ THIS MANUAL
Inside you will nd many helpful hints on how to use
and maintain your air conditioner properly. Just a little
preventive care on your part can save you a great deal
of time and money over the life of your air conditioner.
You'll nd many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips
for service at all.
rst, you may not need to call
PRECAUTION
Contact the authorized service technician for repair or
maintenance of this unit.
Contact the installer for installation of this unit.
The air conditioner is not intended for use by young
children or invalids without supervision.
Young children should be supervised to ensure that
they do not play with the air conditioner.
When the power cord is to be replaced, replacement
work shall be performed by authorized personnel only
using only genuine replacement parts.
Installation work must be performed in accordance with
the National Electric Code by quali ed and authorized
personnel only.
2
Indoor Unit
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be
followed.
 Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classi ed
by the following indications.
WARNING
This symbol indicates the possibility of death or serious injury.
CAUTION
This symbol indicates the possibility of injury or damage to properties only.
 Meanings
of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
WARNING

Installation
Do not use a defective or
underrated circuit breaker. Use
this appliance on a dedicated
circuit.
For electrical work, contact the
dealer, seller, a quali ed
electrician, or an Authorized
Service Center.
Always ground the product.
There is risk of re or electric
shock.
Do not disassemble or repair the
product. There is risk of re or
electric shock.
There is risk of re or electric
shock.
Install the panel and the cover
of control box securely.
Always install a dedicated
circuit and breaker.
Use the correctly rated breaker
or fuse.
There is risk of re or electric
shock.
Improper wiring or installation
may cause re or electric shock
There is risk of re or electric
shock.
Do not modify or extend the
power cable.
Do not install, remove, or reinstall the unit by yourself
(customer).
Be cautious when unpacking
and installing the product.
There is risk of re or electric
shock.
There is risk of re, electric shock,
explosion, or injury.
Sharp edges could cause injury.
Be especially careful of the case
edges and the ns on the
condenser and evaporator.
For installation, always contact
the dealer or an Authorized
Service Center.
Do not install the product on a
defective installation stand.
Do not turn on the breaker or
power under condition that
front panel, cabinet, top cover,
control box cover are removed
or opened.
There is risk of re, electric shock,
explosion, or injury.
It may cause injury, accident, or
damage to the product.
Otherwise, it may cause re,
electric shock, explosion or death.
Owner s Manual 3
ENGLISH
Safety Precautions
Safety Precautions
Be sure the installation area does not deteriorate
with age.
Use a vacuum pump or Inert (nitrogen) gas when
doing leakage test or air purge. Do not compress
air or Oxygen and Do not use Flammable gases.
Otherwise, it may cause re or explosion.
If the base collapses, the air conditioner could fall
with it, causing property damage, product failure, and
personal injury.
There is the risk of death, injury, re or explosion.

4
Operation
Take care to ensure that power
cable could not be pulled out or
damaged during operation.
Do not place anything on the
power cable.
Do not touch(operate) the
product with wet hands.
There is risk of re or electric
shock.
There is risk of re or electric
shock.
There is risk of re or electrical
shock.
Do not place a heater or other
appliances near the power
cable.
Do not allow water to run into
electric parts.
Do not store or use ammable
gas or combustibles near the
product.
There is risk of re and electric
shock.
It may cause There is risk of re,
failure of the product, or electric
shock.
There is risk of re or failure of
product.
Do not use the product in a
tightly closed space for a long
time.
When ammable gas leaks,
turn off the gas and open a
window for ventilation before
turn the product on.
If strange sounds, or small or
smoke comes from product.
Turn the breaker off or
disconnect the power supply
cable.
Oxygen de ciency could occur.
Do not use the telephone or turn
switches on or off.
There is risk of explosion or re
There is risk of electric shock or
re.
Stop operation and close the window in
storm or hurricane.
If possible, remove the product from the
window before the hurricane arrives.
Do not open the inlet grill of the
product during operation.
(Do not touch the electrostatic
lter, if the unit is so equipped.)
When the product is soaked
( ooded or submerged),
contact an Authorized Service
Center.
There is risk of property damage,
failure of product, or electric shock.
There is risk of physical injury,
electric shock, or product failure.
There is risk of re or electric
shock.
Be cautious that water could
not enter the product.
Ventilate the product from time
to time when operating it
together with a stove, etc.
Turn the main power off when
cleaning or maintaining the
product.
There is risk of re, electric shock,
or product damage.
There is risk of re or electric
shock.
There is risk of electric shock.
Take care to ensure that
nobody could step on or fall
onto the outdoor unit.
Do not let the air conditioner
run for a long time when the
humidity is very high and a
door or a window is left open.
Do not turn on the breaker or power
under condition that front panel,
cabinet, top cover, control box
cover are removed or opened.
This could result in personal injury
and product damage.
Moisture may condense and wet
or damage furniture.
Otherwise, it may cause re, electric shock, explosion or death.
Indoor Unit
Safety Precautions
ENGLISH
CAUTION
 Installation
Always check for gas (refrigerant) leakage
after installation or repair of product.
Install the drain hose to ensure that
water is drained away properly.
Keep level even when installing
the product.
Low refrigerant levels may
cause failure of product.
A bad connection may cause
water leakage.
To avoid vibration or water
leakage.
Use two or more people to lift and transport the product.
Avoid personal injury.
 Operation
Do not expose the skin directly
to cool air for long periods of
time. (Don't sit in the draft.)
Do not use the product for special purposes,
such as preserving foods, works of art, etc.
It is a consumer air conditioner, not a
precision refrigeration system.
Do not block the inlet or outlet
of air ow.
This could harm to your health.
There is risk of damage or loss of property.
It may cause product failure.
Use a soft cloth to clean. Do
not use harsh detergents,
solvents, etc.
Do not touch the metal parts of the
product when removing the air
lter. They are very sharp!
Do not step on or put anyting
on the product. (outdoor units)
There is risk of re, electric
shock, or damage to the plastic
parts of the product.
There is risk of personal injury.
There is risk of personal injury
and failure of product.
Always insert the lter securely.
Clean the lter every two weeks
or more often if necessary.
Do not insert hands or other objects
through the air inlet or outlet while the
product is operated.
Do not drink the water drained
from the product.
A dirty lter reduces the ef ciency of
the air conditioner and could cause
product malfunction or damage.
There are sharp and moving parts
that could cause personal injury.
It is not sanitary and could cause
serious health issues.
Use a rm stool or ladder when cleaning or maintaining the product.
Be careful and avoid personal injury.
Owner s Manual 5
Prior to operation
Prior to Operation
Preparing for operation
1. Contact an installation specialist for installation.
2. Use a dedicated circuit.
Usage
1. Being exposed to direct air ow for an extended period of time could be hazardous to your health.
Do not expose occupants, pets, or plants to direct air ow for extended periods of time.
2. Due to the possibility of oxygen de ciency, ventilate the room when used together with stoves or
other heating devices.
3. Do not use this air conditioner for non-speci ed special purposes (e.g. preserving precision
devices, food, pets, plants, and art objects). Such usage could damage the items.
Cleaning and maintenance
1. Do not touch the metal parts of the unit when removing the lter. Injuries can occur when handling
sharp metal edges.
2. Do not use water to clean inside the air conditioner. Exposure to water can destroy the insulation,
leading to possible electric shock.
3. When cleaning the unit, rst make sure that the power and breaker are turned off. The fan rotates
at a very high speed during operation. There is a possibility of injury if the unit s power is
accidentally triggered on while cleaning inner parts of the unit.
Service
For repair and maintenance, contact your authorized service dealer.
6
Indoor Unit
Operating Instructions
ENGLISH
Operating Instructions
Auto Restart Function
In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.
Tips for Filter sign LED
1. Filter sign lamp (LED) is ON.
2. If LED indicating lter sign lamp is ON, clean the lter.
3. After cleaning the lter, press the Timer button and ◀ button of wired remote controller at the same time for 3 sec.
Then lter sign LED is OFF.
Owner s Manual 7
Maintenance and Service
Maintenance and Service
CAUTION: Before performing any maintenance, turn off the main power to
the system.
Grille, Case, and Remote Control
Turn the system off before cleaning. To clean, wipe with
a soft, dry cloth. Do not use bleach or abrasives.
Anti-bio lter
NOTICE
Supply power must be disconnected before
cleaning the indoor unit.
Air
Intake
Air Outlet
Wired Remote Controller
(Accessory)
Air Filters
The air lters behind the front grille should be checked and
cleaned once every 2 weeks or more often if neccessary.
1. Remove the Air lters.
 Take hold of the tab and pull slightly forward
to remove the lter.
CAUTION: When the air lter is
to be removed, do not touch the
metal parts of the indoor unit.
It may cause an injury.
Rack
2. Clean dirt from the air lter using a vacuum
cleaner or washing with water.
 If dirt is conspicuous, wash with a neutral
detergent in lukewarm water.
 If hot water (50 °C or more) is used, it may be
deformed.
Air Filter
use any of the followings:
Water hotter than 40 °C.
Could cause deformation and/or
discoloration.
Volatile substances.
Could damage the
surfaces of the air
SI
conditioner.
N NER
3. After washing with water, dry well in
the shade.
 Do not expose the air lter to direct
sunlight or heat from a re when drying
it.
 Never
B en
8
zene
Indoor Unit
4. Install the air lter.
SCO
U R IN
CLB
ARGE
Maintenance and Service
When it is not going to be used for
a long time.
When the air conditioner is to be used again.
Operate the air conditioner at the
following settings for 2 to 3 hours.
Type of operation: Fan operation mode.
This will dry out the internal mechanisms.
Turn off the breaker.
Clean the air lter and install it in the
indoor unit.
(Refer to page 10 for cleaning it.)
Check that the air inlet and outlet of the
indoor/outdoor unit are not blocked.
CAUTION
Turn off the breaker when the air conditioner
is not going to be used for a long time.
Dirt may collect and may cause a re.
Check that the ground wire is
connected correctly. It may be connect
to the indoor unit side.
Helpful information
The air lters and your electiric bill.
If the air lters become clogged with dust, the cooling
capacity will drop, and 6 % of the electricity used to
operate the air conditioner will be wasted.
Operation Tips
Do not overcool the room.
Keep blinds or curtains
closed.
Keep the room temperature
uniform.
This is not good for the health
and wastes electricity.
Do not let direct sunshine
enter the room when the air
conditioner is in operation.
Adjust the vertical and
horizontal air ow direction to
ensure a uniform temperature
in the room.
Make sure that the doors
and windows are shut tight.
Clean the air lter regularly.
Ventilate the room
occasionally.
Avoid opening doors and
windows as much as possible
to keep the cool air in the
room.
Blockages in the air lter
reduce the air ow and lower
cooling and dehumidifying
effects. Clean at least once
every two weeks.
Since windows are kept
closed, it is a good idea to
open them and ventilate the
room now and then.
Owner s Manual 9
ENGLISH
When the air conditioner is not going to be used for a long time.
Maintenance and Service
Before you call for service...
?
Troubleshooting Tips! Save time and money!
Check the following points before requesting repairs or service.... If the malfunction persist,
please contact your dealer.
The air conditioner
does not operate.
The room has a
peculiar odor.
It seems that
condensation is
leaking from the air
conditioner.
Air conditioner does
not operate for about
3 minutes when
restart.
Have you made a
mistake in timer
operation?
Has the fuse blown
or has the circuit
breaker been
tripped?
Check that this is not
a damp smell exuded
by the walls, carpet,
furniture or cloth
items in the room.
Condensation occurs
when the air ow from
the air conditioner
cools the warm room
air.
This is the protector
of the mechanism.
Wait about three
minutes and
operation will begin.
Does not cool or heat
effectively.
The air conditioner
operation is noisy.
Crack sound is
heard.
Remote control
display is faint, or no
display at all.
Is the air lter dirty?
See air lter cleaning
instructions.
The room may have
been very hot when
the room air
conditioner was rst
turned on. Allow time
for it to cool down.
Has the temperature
been set incorrectly?
Are the indoor unit's
air inlet or outlet vents
obstructed?
For a noise that
sounds like water
owing.
-This is the sound of
freon owing inside
the air conditioner
unit.
For a noise that
sounds like the
compressed air
releasing into
atmosphere.
-This is the sound of
the dehumidifying
water being
processed inside the
air conditioning unit.
This sound is generated
by the expansion/
constriction of the front
panel, etc. due to
changes of
temperature.
Are the batteries
depleted?
Are the batteries
inserted in the
opposite (+) and (-)
directions?
Filter sign lamp
(LED) is ON.
Cleaning the lter,
press the Timer button
and ◀ button of wired
remote controller at
the same time for 3
sec.
NOTICE
WATER RESISTANT: The outdoor side of this appliance is WATER RESISTANT.
The indoor side is not water resistant and should not be exposed to
excess water.
10
Indoor Unit
MFL65920702
P/No : MFL65920702_v0
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